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Finding the Fourth Proportional to 128,535.92, 191,928.92 and 113,417.04

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Solution

The fourth proportional to 128,535.92, 191,928.92 and 113,417.04 is: 169,353.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,535.92 : 191,928.92 = 113,417.04 : x
  2. Step 2: Convert to fraction form
    128,535.92/191,928.92 = 113,417.04/x
  3. Step 3: Cross multiply
    128,535.92x = 191,928.92 × 113,417.04
  4. Step 4: Simplify right side
    128,535.92x = 21,768,009,996.80
  5. Step 5: Solve for x
    x = 21,768,009,996.80/128,535.92
  6. Step 6: Final answer
    x = 169,353.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.